It's sort of like NNN lease). 

Tenant had bad credit which he explained (540-570); I wanted to rent the apt for the winter so I wrote a 6 month lease and explained we could extend if all goes well (lease dates Dec 1 - Jun 1).

Review their lease agreement and addendums.

Regarding giving notice, it is hard to say with out reading the lease but most leases give either party the ability to terminate the lease with a certain notice. 

You’ll find that if leases are in place a portion of those rental amounts can be used to help you qualify.

2 co-tenants moved in together and both are on the lease. 1 went to jail and the other tenant now has a restraining order against them.Tenant with the restraining order wants the other off the lease. 

Some contact me 6 to 9 months in advance before doing anything then to find the property when the search starts and close on something can be another 3 to 4 months.So if you have small reserves to start the second job might make sense or you do property management or tenant lease brokering in between sales for small pops of income.

The building is built in 1970s and I am wondering other than foundation and slab what are the most important things that I need to watch out in order of most important to the lease.

Personally, I require "automatic recurring payments" in my lease. 

We’ve picked up so many of oceanpointe’s houses and seen the fraud first hand (mostly double leases where the tenant pays $500 and oceanpointe pays $650) but one we just sent an owner who had paid up front for a completely remodeled house a 51k rehab estimate.